The PM sensor includes: a filter member having a plurality of measuring cells which are defined by a porous partition wall and configured to trap particulate matter in exhaust gas; at least a pair of electrode members which are disposed to face each other with the measuring cell sandwiched therebetween to form a condenser; a heater member which heats the measuring cell to burn and remove particulate matter accumulated in the measuring cell; and an estimation unit which estimates an amount of the particulate matter contained in the exhaust gas based on an electrostatic capacity between the pair of electrode members.
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June 11, 2015
July 30, 2019
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